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** This file is part of the demonstration applications of the Qt Toolkit.
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#include "QxHeadingItem.hpp"
#include "QxColors.hpp"

QxHeadingItem::QxHeadingItem( const QString& text, QGraphicsScene* scene, QGraphicsItem* parent )
  : QxDemoItem( scene, parent )
{
  this->text = text;
  this->noSubPixeling = true;
}

QImage* QxHeadingItem::createImage( const QMatrix& matrix ) const
{
  float sx = qMin(matrix.m11(), matrix.m22());
  float sy = matrix.m22() < sx ? sx : matrix.m22();
  QFontMetrics fm( QxColors::headingFont() );

  float w = fm.width(this->text) + 1;
  float h = fm.height();
  float xShadow = 3.0f;
  float yShadow = 3.0f;

  QImage *image = new QImage( int((w + xShadow) * sx), int((h + yShadow) * sy), QImage::Format_ARGB32_Premultiplied );
  image->fill( QColor(0, 0, 0, 0).rgba() );
  QPainter painter( image );
  painter.setFont( QxColors::headingFont() );
  painter.scale( sx, sy );

  //draw shadow
  QLinearGradient brush_shadow( xShadow, yShadow, w, yShadow );
  brush_shadow.setSpread( QLinearGradient::PadSpread );
  if( QxColors::useEightBitPalette ) {
    brush_shadow.setColorAt( 0.0f, QColor(0, 0, 0) );
  } else {
    brush_shadow.setColorAt( 0.0f, QColor(0, 0, 0, 100) );
  }
  QPen pen_shadow;
  pen_shadow.setBrush(brush_shadow);
  painter.setPen( pen_shadow );
  painter.drawText( int(xShadow), int(yShadow), int(w), int(h), Qt::AlignLeft, this->text );

  // draw text
  QLinearGradient brush_text( 0, 0, w, w );
  brush_text.setSpread( QLinearGradient::PadSpread );
  brush_text.setColorAt( 0.0f, QColor(255, 255, 255) );
  brush_text.setColorAt( 0.2f, QColor(255, 255, 255) );
  brush_text.setColorAt( 0.5f, QColor(190, 190, 190) );
  QPen pen_text;
  pen_text.setBrush( brush_text );
  painter.setPen( pen_text );
  painter.drawText( 0, 0, int(w), int(h), Qt::AlignLeft, this->text );
  return image;
}

void QxHeadingItem::animationStarted( int )
{
  this->noSubPixeling = false;
}

void QxHeadingItem::animationStopped( int )
{
  this->noSubPixeling = true;
}
